Perhaps you should try some spelling variations:
cong tuong » cong thuong, cong truong, cong trong
hoc chieu » hoc thieu, ho chieu, hoc hien
cong thuc » cong tac
thuc cong » thuoc cong, thu cong, chuc cong
tuong dan » huong dan, tung dan, xuong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (toc thieu)) sach - thanh cong thuc cong tuong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (toc thieu)) sach - thanh cong thuc cong tuong dan phan dau*.